Wireshark · Ethereal-users: Re: [Ethereal-users] OSPF LSA

[Guy Harris <gharris@xxxxxxxxx>]

Kraus Blaise wrote:

> I have a network with 4 computers. A windows (windows
> 2000 )- computer wich run the Ethhereal0.10.7 and
> three Linux-computers.  The first, the second
> Linux-computer and the windows-computer are connected
> through a hub.  The third Linux-computer are connected
> with the first and the second Linux-computer. All
> Linux-computers run the GNU Tebra Routing demon.  My
> problem is that I can only capture Hello packet with
> Ethereal. If I remove a link for instance, Ethereal
> don't capture LSU (LSA).If somebody know, what I can
> do so that Ethereal capture LSU(LSA)-packet,I would be
> very happy.

Is the hub a *true* hub, or a "switching hub", or a dual-speed 
(10/100Mb) hub?  And, if it's a 10/100Mb hub, is the Windows machine 
running at a different speed from the Linux machines?

If the Hello packets are broadcast, but the LSU packets aren't 
broadcast, then, if the hub is a switching hub, or it's a dual-speed hub 
and the Windows machine is running at a different speed from the Linux 
machines, it won't see any unicast traffic between the Linux machines, 
it'll only see unicast traffic sent to it, and broadcast and multicast 
traffic:

	http://www.ethereal.com/faq#q5.1